Cisco Systems XR 12410 manual Troubleshooting the Power Distribution System

Chapter 4 Troubleshooting the Installation

Troubleshooting the Power Subsystem

Troubleshooting the Power Distribution System

The power distribution system consists of:

•AC or DC PEMs which supply –48 VDC to the backplane,

•The chassis backplane which carries voltage to chassis components.

•DC-to-DC converters which convert –48 VDC from the backplane to the correct voltages required by the line cards.

Use the following procedure to troubleshoot the power distribution system.

Step 1 Check each power supply to make sure that:

•The ejector lever is fully closed and properly secured by the its captive screw.

•The Pwr OK indicator is on.

•The Fault and Temp indicators are both off.

If the power supplies meet the above criteria, then the correct source power is present and within tolerance. The power supplies are functioning properly.

Step 2 Make sure the blower module is operating.

•If the blower module is functioning, then the –48 VDC from the chassis backplane and the cables from the backplane to the blower module are functioning properly.

•If the blower module is not functioning, there may be a problem with either the blower module itself, or the –48 VDC power supplied to the blower module. Eject and reseat the blower module.

•If the blower module is still not operating there could be a problem with the blower module controller card or cable. Replace the blower module.

•Contact your Cisco representative if replacing the blower module does not fix the problem.

	Cisco XR 12410 Router Installation Guide
4-14	OL-13832-01